Like peeling an onion, this series. In first volume, we are presented with the sequellae of a revolution that dethroned race-monarchists. In second volume, it is revealed that race-monarchists hunted mosquitos to near extinction and banished centipedes imperfectly to the underworld. This volume reveals that the assassin bugs were also hunted down by the moths (177), and that all kindsa weirdos and nasty business occurs under water in the setting (143-44).
No idea what it all means, except that the story's not so simple as Evil Wasps Empire Kills Everyone, though there's plenty of that in this one, as the three main threads of the volume tilt slightly pro-wasp. Magicke Boxe from volume II is object of one strand here, and comes to no resolution, except that protagonists come off badly.
Mantids and moths accused of "trying to hold back time for five hundred years" (155) confirms that they are simply atavisms.
Anyway, setting and story is starting to grow on me, and now features aerial dog-fighting, chemical warfare, arms limitation treaties, and so on.